816 results about "Materials testing" patented technology

The invention relates to the technical field of material testing, and discloses a coating performance simulation method based on high and low temperature circulation and prestress loading. The method comprises the following steps: constructing a coating matrix composite geometric model containing a microporous structure by acquiring actually measured working condition data of a pipeline or a part, and quantifying surface roughness and interface curvature characteristics in combination with reverse engineering; a dynamic temperature-pressure coupling equation is generated based on the thermal expansion effect of a high-pressure medium, a micropore optical load is converted into equivalent heat flux density through a ray tracing algorithm, transient boundary conditions of a temperature field and a stress field are associated, a crack initiation path is simulated through an extended finite element method, and a life attenuation curve is predicted in combination with a Paris formula. And material parameters are dynamically corrected based on experimental data, and a multi-parameter collaborative optimization model is generated. According to the method, the problems of interface stress evaluation distortion and life prediction deviation under the combined load are solved, and multi-physics field co-simulation support is provided for coating compression resistance optimization.

The invention relates to the technical field of composite material detection, in particular to a fiber-reinforced thermosetting thermoplastic composite structure interface quality detection method and system.The method comprises the steps that vibration excitation is applied to a target area of the surface of a to-be-detected sample, and the amplitude of the excitation is lower than the damage critical value of a weak bonding interface; a dynamic response signal perpendicular to the interface is collected in a vibration field non-diffusion area of the excitation point of the target area; performing frequency domain transformation on the dynamic response signal, and separating a fundamental frequency component and at least one high-order harmonic frequency component; according to the nonlinear enhancement effect of the high-order harmonic frequency component relative to the fundamental wave frequency component, whether the weak bonding defect exists in the target area or not is judged. According to the method, the technical bottleneck that the dynamic evolution process of the weak bonding defect of the composite material interface is difficult to capture in real time is effectively solved, sensitive response to the microdefect is realized through a nonlinear harmonic characteristic enhancement effect, and the recognition precision of traditional ultrasonic detection is improved.

Disclosed example testing system sensor verification devices: a shaft; a body; and a force generator having a first predetermined force response, the first force generator coupled to the shaft and the body such that actuation of the shaft in a first direction from a predetermined position causes the force generator to generate the first predetermined force response.

The invention discloses a method for testing weather resistance of a material based on a low-temperature ice and snow environment, which belongs to the technical field of material testing, and comprises the following steps: generating a dynamic environment parameter set according to an environment simulation script, applying dynamically changing ice and snow loads and multiple physical and chemical environment stresses in a preset composite environment stress cabin, constructing a coupling environment field acting on the to-be-tested sample; and acquiring the state of the to-be-tested sample in the coupling environment field in real time, generating a multi-dimensional monitoring data set, performing comparative analysis on the multi-dimensional monitoring data set and a preset material aging characteristic template, generating material response data representing the current state of the to-be-tested sample, and constructing an environment parameter adjustment instruction set to regulate and control the coupling environment field in the composite environment stress cabin in real time. According to the method, a closed-loop feedback control strategy combining construction of a dynamic coupling environment field and real-time monitoring of material response is adopted, intelligent acceleration of the testing process can be achieved on the premise that the authenticity of a failure mechanism is guaranteed, and the testing efficiency and the accuracy of a result are remarkably improved.

The invention relates to the technical field of wind power blade material testing, and discloses a testing device and method for a salt spray corrosion test of a wind power blade composite material layer. According to the method, wind power blade composite material coating preparation parameters are obtained, and coating basic information is provided for subsequent performance evaluation; based on preset salt spray test environment control parameters, dynamic salt spray environment simulation conditions are generated so as to better fit the actual outdoor environment; then, a multi-sensor coupling monitoring network is constructed, real-time data acquisition is conducted on the corrosion process of the composite material coating, and comprehensive tracking of the corrosion process is achieved; processing real-time data by utilizing a corrosion characteristic analysis algorithm, generating a multi-dimensional corrosion characteristic index, and quantitatively representing the corrosion condition of the coating; and finally, evaluating the anti-corrosion stability of the new material coating in combination with the coating characteristic parameters and the multi-dimensional corrosion characteristic indexes. According to the method, the corrosion resistance of the coating in the actual environment can be more accurately reflected, and support is provided for research, development and application of the composite coating of the wind power blade.

The invention relates to the technical field of material detection, in particular to a silver coating adhesive force detection method based on multi-frequency impedance imaging, which comprises the following steps: applying a dual-mode multi-frequency excitation signal to the surface of a silver coating through an attached microelectrode array, synchronously acquiring voltage-current response data, and generating a dual-mode multi-frequency impedance original data set; performing time-varying impedance phase-locked separation on the dual-mode multi-frequency impedance original data set, extracting a dynamic impedance component of a coating-matrix interface region, and reconstructing a three-dimensional sub-interface impedance distribution diagram; and outputting an adhesive force quantized value through an oscillation frequency-adhesive force conversion model according to the spatial oscillation frequency characteristics of the impedance phase in the three-dimensional sub-interface impedance distribution diagram. According to the invention, a double-phase-locked loop system is adopted to realize the time-varying component demodulation of the impedance response of the silver coating-matrix interface, the low-frequency dynamic impedance signal modulated by silver ion migration is effectively extracted, and the weak change of the interface bonding state is sensitively reflected.

The invention relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which comprises the following steps of: acquiring dynamic characteristic data in a forging process in real time by acquiring multi-dimensional material performance parameters, and constructing a multi-target collaborative optimization model; and intelligent collaborative configuration of the reduction rate parameters is realized by adopting a self-adaptive weight distribution strategy. And a thermal coupling factor normalization equation and a phase field free energy functional normalization model are established, and the technical problems that in a traditional forging process, due to empirical configuration of reduction rate parameters, the structure is uneven, and residual stress exceeds the standard are solved. A lightweight model is deployed through edge computing nodes, millisecond-level dynamic correction of an optimization scheme is realized in combination with a 5G industrial private network, and the grain size qualification rate and the size precision of the titanium alloy forgings are improved. The method improves the yield of the grain size of the forge piece, ensures that the residual stress of the forge piece is reduced, stably controls the size precision, and improves the batch stability of high-end titanium alloy parts.

The present application relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which acquires dynamic characteristic data of a forging process in real time through multi-dimensional material performance parameter collection, constructs a multi-objective collaborative optimization model, and realizes intelligent collaborative configuration of the reduction rate parameter by using an adaptive weight distribution strategy. A thermal coupling factor normalization equation and a phase field free energy functional normalization model are established to solve the technical problems of uneven structure and excessive residual stress caused by the empirical configuration of the reduction rate parameter in the traditional forging process. A lightweight model is deployed through an edge computing node, and millisecond-level dynamic correction of the optimization scheme is realized in combination with a 5G industrial private network, thereby improving the grain size qualification rate and size accuracy of titanium alloy forgings. The present application improves the grain size qualification rate of forgings, ensures stable control of the size accuracy while reducing the residual stress of forgings, and improves the batch stability of high-end titanium alloy components.

The invention discloses a material deformation collaborative acquisition test method, device and equipment and a storage medium, and relates to the technical field of material testing, and the method comprises the following steps: carrying out EBSD calibration on the sample surface of a to-be-tested sample; preparing speckles on the surface of the sample and carrying out in-situ loading so as to carry out DIC determination; removing speckles on the target to-be-tested sample, and returning to execute the step of EBSD calibration based on the to-be-tested sample after speckle removal until in-situ loading of the target to-be-tested sample reaches a preset loading target; and determining an EBSD test result and a DIC test result based on the obtained measurement results of the internal grain orientation information and the material strain information of each sample to be tested. The method does not need to consider the influence of DIC on EBSD calibration, breaks through the limitation of the electron beam on the size of speckle particles or the size of a DIC observation area in EBSD calibration, and improves the test efficiency of material deformation collaborative collection.

The invention discloses a multi-axis multi-field coupling fatigue test device, and belongs to the technical field of material testing. The device comprises a rack, a multi-axis loading unit, an environment simulation unit, a dynamic sealing interface and a cooperative control system. The core of the device is that the test sample can simultaneously bear the coupling effect of multi-axis mechanical stress (pulling, pressing and twisting) and various environmental fields (such as high and low temperatures, corrosive media, illumination and electric fields) through a highly integrated design; and the dynamic sealing problem of the actuator rod in the environment box is solved through an innovative dynamic sealing interface (such as labyrinth-magnetofluid composite sealing). According to the invention, accurate linkage control of multiple channels is realized through the cooperative control system, the service environment of key parts under actual complex working conditions can be truly simulated, and a reliable test platform is provided for failure analysis and life prediction of products under multi-field coupling.

An apparatus for material testing of a specimen. The apparatus-includes a specimen holder for holding a specimen to be tested, a rod arrangement for moving in direction to the specimen holder for transmitting a mechanical load to the specimen, an actuator for moving at least one of the rod arrangement and the specimen holder with respect to each other along a horizontal impact direction, and a supporting base, onto which the specimen holder, the rod arrangement and the actuator are mounted. A specimen holder arrangement is detachably coupled to a holder accommodation section of the supporting base.

The invention discloses a soft soil reinforcement material performance analysis method and system, particularly relates to the technical field of material testing, and is used for solving the problem that an existing discretization testing method cannot accurately judge a material performance stabilization critical time point. Performance parameter time sequence data are obtained through continuous monitoring of a sensor, the mode stability quantity representing evolution characteristic consistency and the complexity equilibrium quantity representing multi-time scale behavior regularity are calculated, candidate critical points are identified when the mode stability quantity and the complexity equilibrium quantity are continuously higher than and lower than set threshold values respectively, and then the candidate critical points are identified through comparison verification with a standard performance development envelope band. Finally, an effective performance stabilization critical time point is output, continuous monitoring and accurate analysis of the whole material performance development process are achieved, and a reliable technical means is provided for performance evaluation of the soft soil reinforcement material.

The invention relates to the technical field of building material detection, and discloses an automatic experimental device for building material detection, which comprises a conveyor belt support, the upper surface of the conveyor belt support is fixedly connected with a fixed support I, the conveyor belt is arranged in the conveyor belt support, the fixed support I is internally fixedly connected with an air cylinder, and the air cylinder is fixedly connected with a fixed support II. And the output end of the air cylinder is fixedly connected with a pressing plate, the two sides of the interior of the pressing plate are rotationally connected with second connecting rods, and one end of each second connecting rod is slidably connected with a pushing rod. Through cooperative operation of components such as an air cylinder, a pressing plate, a second connecting rod and a pushing rod, building materials placed on the conveying belt can be automatically clamped, fixed and positioned to the middle of the conveying belt, and compared with a traditional manual positioning mode, the automatic positioning structure remarkably improves the accuracy and stability of positioning of the building materials; detection result errors caused by material position deviation are avoided, and a solid foundation is laid for subsequent detection.

The invention relates to the technical field of heating element detection, and discloses a heating element material testing device and method and a storage medium, and the heating element material testing method comprises the steps: obtaining a testing mode and testing parameters; when a test instruction is received, initial resistance value detection is carried out on the heating body material; and when the heating element material passes the initial resistance value detection, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters, and displaying a test result. According to the technical scheme, by flexibly setting the test mode and the test parameters, accurate detection and performance evaluation of the heating element material are achieved, and reliable reference data can be provided for subsequent tests through initial resistance detection; the power calibration test ensures the consistency of the heating body under different power conditions, and the power-on test simulates the performance in an actual working state, so that whether the material of the heating body meets the design requirements or not can be quickly judged, and an efficient and reliable solution is provided for product quality control.

The invention relates to the field of metal material testing, in particular to equipment for testing material performance, which comprises a testing platform, the testing platform is provided with a detection mechanism, a supporting mechanism, an extrusion mechanism and a power mechanism, the extrusion mechanism and the power mechanism are arranged on the supporting mechanism, and the extrusion mechanism comprises an extrusion block and a reversing unit for adjusting the orientation change of the extrusion block. At least one end of the extrusion block is open, the extrusion block is used for shearing and crushing a to-be-tested substrate, and a rotating handle is arranged on the extrusion block; and the power mechanism comprises a shearing driving unit and a pressure driving unit which are used for driving the extrusion block to move. By implementing the scheme, the test efficiency of the magnesium alloy material under various test conditions is improved.

The invention belongs to a testing and processing method, and provides a single-probe non-contact dielectric material testing and processing integrated system and a single-probe non-contact dielectric material testing and processing integrated method in order to solve the technical problems of poor real-time performance and controllability and low production efficiency of the existing dielectric material testing and processing technology. Comprising a controllable objective table, a resonant cavity single probe assembly, a programmable multi-way switch and a control unit, a single epitaxial microwave resonant cavity probe is adopted as a core component, and rapid switching and regulation of the resonant cavity single probe assembly, a vector network analyzer and a program control microwave signal generation and regulation device are realized through the programmable multi-way switch. By means of the testing and processing integrated system, non-contact type dielectric constant dynamic measurement and microwave processing can be alternately completed.

The invention relates to the technical field of material testing, and discloses a phase change temperature calibration method and system for a phase change material, and the method comprises the steps: collecting the surface temperature distribution data and crystal structure parameters of the phase change material based on a bimodal synchronous monitor, and building a temperature-structure incidence matrix; when the parameters of the crystal structure suddenly change, determining surface temperature distribution data corresponding to a sudden change moment based on the temperature-structure incidence matrix, and calculating an initial phase change temperature interval; constructing a nonlinear mapping model of the initial phase-change temperature interval and the heating rate, and performing dynamic compensation on the initial phase-change temperature interval based on the nonlinear mapping model to obtain a corrected phase-change temperature; inputting the corrected phase change temperature into a gradient temperature control module containing a standard sample; and comparing the offset of the actual phase change position and the theoretical position of the reference material, and reversely correcting and correcting the phase change temperature based on the offset to obtain the final calibration temperature. The calibration accuracy of the phase change temperature of the phase change material can be improved.

The invention discloses a tensile bending and thermal stress combined test device and method, and belongs to the technical field of material testing, the device comprises a support frame, and the support frame is provided with a mechanical tensile device and a three-point bending device; the mechanical stretching device comprises a first sliding base, a second sliding base, a two-way threaded rod, a first clamping assembly and a second clamping assembly, and the middle of the first sliding base and the middle of the second sliding base are connected with the two-way threaded rod through threaded structures. The top ends of the first sliding base and the second sliding base are fixedly connected with a first clamping assembly and a second clamping assembly respectively, a sample is fixed between the first clamping assembly and the second clamping assembly, and the tensile force of the sample is detected by rotating a bidirectional threaded rod; the three-point bending device is arranged at the top of the supporting frame, and the bending force of the sample is detected through downward pressing of the three-point bending device. According to the invention, a stretching-bending-thermal stress combined aging test is carried out on a hot melt adhesive bonding sample under a set condition, and the performance of a hot melt adhesive layer under a long-term operation condition is tested.

The invention relates to the technical field of construction material testing, and provides a tunnel construction material waterproof performance testing device which comprises a freezing and thawing test box, a machine box and a rack, a pressurized water injection system and a sealing slotting mechanism are arranged in the rack side by side, and the pressurized water injection system comprises a jack and a water pressure system; the jack is used for detecting the bearing load strength of the material test block, and the water pressure system is used for pressurizing water and detecting the waterproof performance of the material test block under high load. The tunnel construction material waterproof performance testing device integrates pressure resistance, erosion resistance, freezing resistance and waterproof performance detection tests on construction materials, can simulate the overall state of the construction materials in different tunnel environments to perform waterproof performance tests, so that the construction materials are added according to different tunnel requirements to improve the waterproof performance, and meanwhile, through the arrangement of the sealing slotting mechanism, the waterproof performance of the tunnel construction material is improved. The contact surface of the material test block and the water pressure system can be subjected to sealing waterproof treatment, and water is prevented from overflowing from the contact surface during water seepage detection.

The invention discloses a method and a system for correcting a measuring working surface of a composite material thickness gauge, and belongs to the technical field of composite material testing. In order to solve the problem that the traditional thickness gauge is limited in measurement precision and correction range, the invention mainly adopts the laser light source emission and reception, the light interference principle and the design of the separated laser generator and receiver. By determining the relative position of the reference plane and the measurement working surface and correcting the measurement working surface by using the light cross interference phenomenon, the measurement precision can be improved, the correction range can be expanded, and the accuracy and stability of composite material measurement can be ensured. According to the invention, high-precision and widely applicable composite material thickness measurement can be realized, the error problem in a traditional method is solved, and the measurement efficiency and the data reliability are improved.

The invention relates to the technical field of material test and analysis, in particular to a solid material mixing uniformity detection method, which comprises the following steps of: 1, establishing a component characteristic response interval; 2, executing three-dimensional dynamic spectrum scanning; step 3, separating component contribution degrees, performing baseline correction and scattering compensation on original spectral data, calculating a weighted integral value of a spectral reflectivity signal in an exclusive characteristic wave band for each scanning point according to the mapping table, and outputting a contribution vector representing component concentration; 4, quantifying mixing uniformity, dividing a container space into three-dimensional units, and calculating a variable coefficient of a contribution vector of component concentration in each unit; and generating a weight coefficient based on the component mass ratio and the stability criticality, and evaluating the uniformity through a mixed index formula. Through accurate component identification, lossless three-dimensional scanning, accurate scattering compensation and mixing index evaluation comprehensively considering stability criticality, the uniformity of the mixed material can be comprehensively and accurately reflected.

The utility model provides a viscous-elastic material testing clamp and a viscous-elastic material testing device.The viscous-elastic material testing clamp comprises a clamp body and a first limiting structure, the clamp body is provided with a first limiting groove, and the depth direction parallel to the first limiting groove serves as the first direction, and the depth direction parallel to the first limiting groove serves as the second direction perpendicular to the first direction; at least one side of the side wall, forming the first limiting groove, of the clamp body communicates with the outside to form a first installation opening, and the first limiting groove is at least a semi-closed groove. The first limiting structure detachably blocks the first mounting opening; when the clamp main body is subjected to a force parallel to the first direction, the clamp main body forming the inner wall of the first limiting groove abuts against the viscous-elastic material test piece in the force application direction. Compared with the prior art, the viscous-elastic material test piece is stably limited through the first limiting groove formed in the clamp body, and flexible disassembly and assembly of the viscous-elastic material test piece can be achieved through the detachable first limiting structure.

The invention relates to the technical field of permeable material testing, solves the problem that a more complete material selection basis cannot be provided for engineering design in the prior art, and provides a method, a device and equipment for testing the heat dissipation performance of an evaporative cooling material and a storage medium. Acquiring a first mass change value of the to-be-tested sample in the simulated rainfall process; when the instantaneous moisture content meets a preset condition, rainfall simulation is stopped, and a second mass change value of the to-be-tested sample in a preset duration is obtained; placing the to-be-tested sample in the wind tunnel test platform, and obtaining a third mass change value and a surface temperature change value of the to-be-tested sample and an environment temperature change value, a humidity change value and a wind speed change value of the wind tunnel test platform; and obtaining a heat dissipation performance evaluation result of the to-be-tested sample based on the parameters. According to the method, quantitative, comparable and repeatable evaluation of the cooling capacity of the permeable material is realized, and a scientific basis is provided for material performance judgment and application scene selection.

The utility model relates to the field of material testing, in particular to a diaphragm tensile air permeability testing system. Comprising a stretching pre-tightening device and an air permeability testing device, the stretching pre-tightening device comprises a fixed clamp, a movable clamp, a dynamometer and a transmission mechanism, the fixed clamp and the movable clamp are oppositely arranged, the air permeability testing device is located between the fixed clamp and the movable clamp, the measuring end of the dynamometer is connected with the fixed clamp through a sample, and the transmission mechanism is connected with a body of the dynamometer. According to the utility model, the diaphragm can be subjected to air permeability test in a stretching state, and the air permeability is accurately measured and evaluated.

The invention provides a mechanical testing system, and belongs to the technical field of material testing. Comprising a size measuring mechanism used for measuring the size of a sample; a stretching mechanism is arranged on the supporting frame; the non-contact measuring mechanism and the contact measuring mechanism are arranged on the supporting frame through a first position adjusting mechanism and used for measuring the deformation amount of the sample in the stretching process in a non-contact measuring mode and a contact measuring mode; the first heating mechanism and the second heating mechanism are oppositely arranged on the supporting frame through a second position adjusting mechanism and are used for heating the sample in a non-contact measurement mode and a contact measurement mode; the controller is used for controlling the stretching mechanism, the non-contact measuring mechanism, the contact measuring mechanism, the second position adjusting mechanism, the first heating mechanism and the second heating mechanism to work; and storing the received size information and deformation information. The mechanical property testing device is simple in structure and convenient to operate, and can accurately test the mechanical property of a micro-size sample.

The present invention relates to the field of material testing technology and discloses a method and system for calibrating the phase change temperature of a phase change material. The method comprises: collecting surface temperature distribution data and crystal structure parameters of the phase change material using a dual-modal synchronous monitor and establishing a temperature-structure correlation matrix; determining the surface temperature distribution data corresponding to the mutation moment based on the temperature-structure correlation matrix when the crystal structure parameters undergo a sudden change, and calculating the initial phase change temperature range; constructing a nonlinear mapping model between the initial phase change temperature range and the heating rate, and dynamically compensating the initial phase change temperature range based on the nonlinear mapping model to obtain a corrected phase change temperature; inputting the corrected phase change temperature into a gradient temperature control module containing a standard sample; comparing the offset between the actual phase change position of the reference material and the theoretical position, and reversely correcting the corrected phase change temperature based on the offset to obtain a final calibration temperature. The present invention can improve the accuracy of phase change temperature calibration of phase change materials.

The invention discloses a building material mechanical testing system based on multi-algorithm fusion, and belongs to the technical field of building material testing, and the system comprises an initial damage quantification module which is used for obtaining detection information of a tested material test piece before mechanical loading and generating a quantitative evaluation result; the loading and information acquisition module is used for applying a mechanical load to the tested material test piece with the generated quantitative evaluation result and acquiring a mechanical response signal and a microscopic state signal of the tested material test piece; the damage analysis module is used for calling a preset second data processing algorithm and analyzing and generating a dominant damage path; and the diagnosis and prediction module is used for integrating the associated data atlas and the dominant damage path information, generating a material performance diagnosis report and constructing a prediction model through a preset third data processing algorithm. According to the method, the initial damage of the tested material test piece is quantified, so that systematic deviation of a test result caused by neglecting the initial damage is corrected.

The utility model discloses a material testing device under erosion and cavitation coupling action, which comprises a container, an ultrasonic transducer, an injector head and a circulating device, a placing table is arranged in the container, the ultrasonic transducer is used for being arranged above the placing table, the injector head is arranged at the lower end of the ultrasonic transducer, and the circulating device is arranged on the placing table. The circulating device comprises a booster pump, a liquid inlet of the booster pump is communicated with the container, and a liquid outlet of the booster pump is connected with the injector head through a pipeline; in the using state, the ultrasonic transducer is electrically connected with an ultrasonic power source through a wire. According to the utility model, the erosion medium is pumped into the injector head through the booster pump, and meanwhile, the ultrasonic transducer enables the erosion medium to generate a large number of bubbles in the injector head, so that the erosion medium with the bubbles impacts a test material at a high speed, and the test condition of the hydraulic mechanical material is met.

The invention discloses an intelligent behavior prediction device and method for a carbon fiber composite anti-side-rolling torsion bar material, and relates to the technical field of material testing. The method comprises the following steps: firstly, constructing a material performance database of the carbon fiber composite material, collecting static mechanical property data and fatigue life data, preprocessing the data, and setting and optimizing test parameters; according to the optimized test parameters, a multi-axis dynamic load simulation system is used for testing the anti-side-rolling torsion bar sample, load parameters, strain distribution data and internal damage data are collected, and a sample test data set is formed and calibrated; extracting features from the data set and fusing the features to construct a multivariate feature vector; and utilizing the material performance database, the multivariate feature vector and the material behavior prediction model to predict the material behavior of the anti-side-rolling torsion bar. According to the invention, the material behavior of the carbon fiber composite material anti-side-rolling torsion bar can be accurately predicted, and an efficient and accurate method is provided for intelligent prediction of the material behavior.

The invention relates to the technical field of metal material detection, in particular to a test method for evaluating the recrystallization completion degree of a steel material. The method comprises the following steps: dividing a to-be-detected steel plate into a plurality of blocky steel plate samples; preliminarily determining the range of the recrystallization temperature of the steel plate to be measured according to experience, setting a plurality of temperature gradients in the range, respectively heating a plurality of steel plate samples at different temperatures, carrying out heat preservation for a period of time, and then cooling to room temperature; grinding and polishing the cooled steel plate sample; putting the polished steel plate sample into an X-ray diffractometer sample table, and starting an X-ray diffractometer for scanning to obtain diffraction patterns of the steel plate sample at different temperatures; and judging the recrystallization completion degree of the steel plate sample according to the separation condition of the diffraction peaks K alpha1 and K alpha2 in the diffraction pattern. The method has the advantages of simple sample preparation and inspection methods, and results are representative and are basically not influenced by subjective effects of operators due to a large test area.